<template>
  <div class="app-container">
    讲师表单
     <el-form label-width="120px">
      <el-form-item label="讲师名称">
        <el-input v-model="teacher.name"/>
      </el-form-item>
      <el-form-item label="讲师排序">
        <el-input-number v-model="teacher.sort" controls-position="right" min="0"/>
      </el-form-item>
      <el-form-item label="讲师头衔">
        <el-select v-model="teacher.level" clearable placeholder="请选择">
          <el-option :value="1" label="高级讲师"/>
          <el-option :value="2" label="首席讲师"/>
        </el-select>
      </el-form-item>
      <el-form-item label="讲师资历">
        <el-input v-model="teacher.career"/>
      </el-form-item>
      <el-form-item label="讲师简介">
        <el-input v-model="teacher.intro" :rows="10" type="textarea"/>
      </el-form-item>

      <!-- 讲师头像 -->
      <el-form-item label="讲师头像">

          <!-- 头衔缩略图 -->
          <pan-thumb :image="teacher.avatar"/>
          <!-- 文件上传按钮 -->
          <el-button type="primary" icon="el-icon-upload" @click="imagecropperShow=true">更换头像
          </el-button>

          <!--
              v-show：是否显示上传组件
              :key：类似于id，如果一个页面多个图片上传控件，可以做区分
              :url：后台上传的url地址
              @close：关闭上传组件
              @crop-upload-success：上传成功后的回调 -->
          <image-cropper
                        v-show="imagecropperShow"
                        :width="300"
                        :height="300"
                        :key="imagecropperKey"
                        :url="BASE_API+'/eduoss/fileoss'"
                        field="file"
                        @close="close"
                        @crop-upload-success="cropSuccess"/>

      </el-form-item>

      <el-form-item>
        <el-button :disabled="saveBtnDisabled" type="primary" @click="saveOrUpdate">保存</el-button>
      </el-form-item>
    </el-form>

  </div>
</template>
  </div>
</template>


<script>
import teacherApi from '@/api/edu/teacher'
import ImageCropper from '@/components/ImageCropper'
import PanThumb from '@/components/PanThumb'

export default {
  components: { ImageCropper, PanThumb },
  data() {
      return {
          teacher: {
              name: '',
              sort: 0,
              level: 1,
              career: '',
              intro: '',
              avatar: ''  //可以添加默认头像图片
          },
          
          imagecropperShow:false, //上传弹框组件是否显示
          imagecropperKey:0, //上传组件key值
          BASE_API:process.env.BASE_API, //获取dev.env.js里面的地址

          saveBtnDisabled: false // 保存按钮是否禁用
      }
  },
  created() {
    this.init()
  },
  watch: { //监听
    $route(to, from) {  //路由变化的方式, 路由发生变化,该方法会执行
      console.log('watch $route')
      this.init()
    }
  },

  methods: {
    close() { //关闭上传弹框的方法
      this.imagecropperShow = false
      this.imagecropperKey = this.imagecropperKey+1
    },
    cropSuccess(data) { //上传成功的方法
      this.imagecropperShow = false
      //上传之后接口返回图片地址
      this.teacher.avatar = data.url
      this.imagecropperKey = this.imagecropperKey+1
    },
  
    init() {
      //判断路径中有id值,做修改
      if (this.$route.params && this.$route.params.id) {
        const id = this.$route.params.id
        this.getInfo(id)
      }else { //没有id值,做添加
        this.teacher = {}
      }
    },

    saveOrUpdate() {
      //判断是修改还是添加 -> 根据teacher是否有id
      if(!this.teacher.id) {
        //添加
        this.saveTeacher()
      }else {
        this.updateTeacher()
      }

      
    },
    //修改讲师的方法
    updateTeacher() {
      teacherApi.updateTeacherInfo(this.teacher)
        .then(response => {
          //修改成功
          //提示信息
          this.$message({
              type: 'success',
              message: '修改成功!'
          });
          //回到列表页面 路由跳转
          this.$router.push({path:'/teacher/table'})
        })
    },

    //添加讲师的方法
    saveTeacher() {
        teacherApi.addTeacher(this.teacher)
            .then(response => {//添加成功
                //提示信息
                this.$message({
                    type: 'success',
                    message: '添加成功!'
                });
                //回到列表页面 路由跳转
                this.$router.push({path:'/teacher/table'})
            })
    },

    getInfo(id) {
      teacherApi.getTeacherInfo(id)
        .then(response => {
          this.teacher = response.data.teacher
        })
    }

  }
}
</script>